geom_int.h revision 110759
1157909Speter/*- 2157909Speter * Copyright (c) 2002 Poul-Henning Kamp 3157909Speter * Copyright (c) 2002 Networks Associates Technology, Inc. 4157909Speter * All rights reserved. 5157909Speter * 6157909Speter * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7157909Speter * and NAI Labs, the Security Research Division of Network Associates, Inc. 8157909Speter * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9157909Speter * DARPA CHATS research program. 10157909Speter * 11157909Speter * Redistribution and use in source and binary forms, with or without 12157909Speter * modification, are permitted provided that the following conditions 13157909Speter * are met: 14157909Speter * 1. Redistributions of source code must retain the above copyright 15157909Speter * notice, this list of conditions and the following disclaimer. 16157909Speter * 2. Redistributions in binary form must reproduce the above copyright 17157909Speter * notice, this list of conditions and the following disclaimer in the 18157909Speter * documentation and/or other materials provided with the distribution. 19157909Speter * 3. The names of the authors may not be used to endorse or promote 20157909Speter * products derived from this software without specific prior written 21157909Speter * permission. 22157909Speter * 23157909Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24157909Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25157909Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26286954Sandrew * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27157909Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28157909Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29157909Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30157909Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31157909Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32157909Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33286954Sandrew * SUCH DAMAGE. 34157909Speter * 35157909Speter * $FreeBSD: head/sys/geom/geom_int.h 110759 2003-02-12 09:48:27Z phk $ 36157909Speter */ 37157909Speter 38157909SpeterLIST_HEAD(class_list_head, g_class); 39157909SpeterTAILQ_HEAD(g_tailq_head, g_geom); 40157909SpeterTAILQ_HEAD(event_tailq_head, g_event); 41286954Sandrew 42286954Sandrewextern struct event_tailq_head events; 43286954Sandrewextern int g_collectstats; 44286954Sandrewextern int g_debugflags; 45286954Sandrew/* 46157909Speter * 1 G_T_TOPOLOGY 47157909Speter * 2 G_T_BIO 48157909Speter * 4 G_T_ACCESS 49 * 8 enable sanity checks 50 * 16 Allow footshooting on rank#1 providers 51 */ 52 53/* 54 * Various internal actions are tracked by tagging g_event[s] onto 55 * an internal eventqueue. 56 */ 57enum g_events { 58 EV_NEW_CLASS, /* class */ 59 EV_NEW_PROVIDER, /* provider */ 60 EV_SPOILED, /* provider, consumer */ 61 EV_CALL_ME, /* func, arg */ 62 EV_LAST 63}; 64 65struct g_event { 66 enum g_events event; 67 TAILQ_ENTRY(g_event) events; 68 struct g_class *class; 69 struct g_geom *geom; 70 struct g_provider *provider; 71 struct g_consumer *consumer; 72 void *arg; 73 g_call_me_t *func; 74}; 75 76/* 77 * We actually have a number of drivers sharing the same major number 78 * so we coordinate the major/minor usage here 79 */ 80#define GEOM_MAJOR 4 81#define GEOM_MINOR_STATS 0 82#define GEOM_MINOR_PROVIDERS 10 83 84/* geom_dump.c */ 85void g_confxml(void *); 86void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp); 87void g_confdot(void *); 88void g_conftxt(void *); 89 90/* geom_event.c */ 91void g_event_init(void); 92void g_post_event(enum g_events ev, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp); 93void g_run_events(void); 94 95/* geom_subr.c */ 96extern struct class_list_head g_classes; 97extern char *g_wait_event, *g_wait_sim, *g_wait_up, *g_wait_down; 98 99/* geom_io.c */ 100void g_io_init(void); 101void g_io_schedule_down(struct thread *tp); 102void g_io_schedule_up(struct thread *tp); 103 104/* geom_kern.c / geom_kernsim.c */ 105void g_init(void); 106 107/* geom_stats.c */ 108void g_stat_init(void); 109struct g_stat *g_stat_new(void *id); 110void g_stat_delete(struct g_stat *); 111